b3f19e8412d8073bf650cc6a9be86fd2538080960e76861122dbe89d8de206c2

Analysis

max time kernel
0s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
05/06/2024, 06:22

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General

Target

2024-06-05_f8aec2faf3f15e6284aa45ce6548992b_cryptolocker.exe
Size

40KB
MD5

f8aec2faf3f15e6284aa45ce6548992b
SHA1

cc7db7b3e8a47c3df2392cf3f9963ac68e6f31c8
SHA256

b3f19e8412d8073bf650cc6a9be86fd2538080960e76861122dbe89d8de206c2
SHA512

de24b13baf1b74ea9a31d5271776a23b3c4c2e3744ef908fd54f5da5ae05b897fe6b3ef257ee30f0eb991bbcedc1c1ce7887502d912c16069e82aedf028a6cb9
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9Xm:qDdFJy3QMOtEvwDpjjWMl7TV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2488-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000015d61-24.dat	CryptoLocker_rule2
behavioral1/memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2488-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2488-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000015d61-24.dat	CryptoLocker_set1
behavioral1/memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2488-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2488-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000015d61-24.dat	UPX
behavioral1/memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2488-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2488	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
3040	2024-06-05_f8aec2faf3f15e6284aa45ce6548992b_cryptolocker.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2488-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000015d61-24.dat	upx
behavioral1/memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2488-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2488	3040	2024-06-05_f8aec2faf3f15e6284aa45ce6548992b_cryptolocker.exe	28
PID 3040 wrote to memory of 2488	3040	2024-06-05_f8aec2faf3f15e6284aa45ce6548992b_cryptolocker.exe	28
PID 3040 wrote to memory of 2488	3040	2024-06-05_f8aec2faf3f15e6284aa45ce6548992b_cryptolocker.exe	28
PID 3040 wrote to memory of 2488	3040	2024-06-05_f8aec2faf3f15e6284aa45ce6548992b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-05_f8aec2faf3f15e6284aa45ce6548992b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_f8aec2faf3f15e6284aa45ce6548992b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
41KB

MD5
36e3e80c749a17c65c701936ad348ab0

SHA1
551048d3983997b005c234abdbf1c0738c29be19

SHA256
dc8a282cad1d5d7329c3c8a3e93c81b3ebc6f3afd5e550807ec622515ea5300b

SHA512
f32190f234c0a3fb750427ecb6990708ee527e0bef3319275427960451eea0db6298825688bfb25c3e772ec3c53e97baeef7350bd58a16f600bb17d92329cf29

Download Submit
memory/2488-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2488-25-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2488-18-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2488-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3040-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3040-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3040-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download